Author Topic: Princeton Discovers a Novel Route to Alpha-Aryl Amines  (Read 100 times)

fatfreddy

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Princeton Discovers a Novel Route to Alpha-Aryl Amines
« on: November 30, 2011, 01:44:02 AM »
http://www.sciencedaily.com/releases/2011/11/111128121551.htm

They did so using automated reaction machines, which were the focus of the article. It was written for the general scientifically-curious public, so most details are left out. As a newb, I don't fully understand the implications of this, but it definitely seems like it may well be applicable to psychoactive compounds. Do any of the more knowledgeable members here have a read on its significance? It'll be interesting to see the community reaction if/when they publish it.

Quote
...Illustrating that principle, the Princeton researchers combined two molecules with no history of reacting to generate the type of chemical functionality found in eight of the world's top 100 pharmaceuticals, MacMillan said. The reaction involved a nitrogen-based molecule known as an amine that has a hydrogen and carbon pair, and a circle of atoms stabilized by their bonds known as an aromatic ring.

The result was a carbon-nitrogen molecule with an aromatic ring, a building block of many amine-based pharmaceuticals, explained MacMillan. This class of drugs mimics natural amine molecules in the body and includes medications such as antihistamines, decongestants and antidepressants. In drug development, chemists "tweak" organic molecules to enhance their ability to bind with and disrupt enzymes in a biological system, which is how pharmaceuticals basically operate, MacMillan said. A molecule with an aromatic ring has increased reactivity and makes the tweaking process much easier, he said, but attaching the aromatic ring is a process in itself that typically involves two to three weeks of successive chemical reactions.

The reaction MacMillan and his team found provides a quick way around that.

"We quickly realized that any pharmaceutical research chemist could immediately take these very simple components and, via a reaction no one had known about, start assembling molecules with an adjacent aromatic ring rapidly," MacMillan said.

"Instead of having to construct these important molecules circuitously using lots of different chemistry over a period of days if not weeks, we can now do it immediately in the space of one chemical reaction in one day."

Buchwald said that the rapid production of this molecule is as surprising as it is significant.

"The way these types of molecules -- alpha aryl amines -- were produced in this project is highly efficient, and no person could truthfully say that they would have predicted this reaction," Buchwald said. "This group was able to take a reaction that no one knew was possible and make it practical and useful in a very short time. This really speaks to the power of their overall method."...
« Last Edit: November 30, 2011, 02:26:23 AM by fatfreddy »

fresh1

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Re: Princeton Discovers a Novel Route to Alpha-Aryl Amines
« Reply #1 on: November 30, 2011, 02:11:11 AM »
fascinating stuff. alas I;m still waiting on my rotovap, before I acquire a "high-throughput, automated reaction accelerator" but hey, if anyone knows of a "cheap" one, pm me  :D

 fatfreddy (a comic hero of mine ;D) see if you can chase up some more specific information on the process. Although it doesnt appear particularly OTC one nevers knows how this may play out, so the more data you can add to this thread, the better

cheers f1 ;)
"Curiosity is a gift"

fatfreddy

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Re: Princeton Discovers a Novel Route to Alpha-Aryl Amines
« Reply #2 on: November 30, 2011, 02:20:35 AM »
fascinating stuff. alas I;m still waiting on my rotovap, before I acquire a "high-throughput, automated reaction accelerator" but hey, if anyone knows of a "cheap" one, pm me  :D

 fatfreddy (a comic hero of mine ;D) see if you can chase up some more specific information on the process. Although it doesnt appear particularly OTC one nevers knows how this may play out, so the more data you can add to this thread, the better

cheers f1 ;)

The machine's purpose was just to combine chemicals that have not yet been reacted to see what happens, and to do so quickly and efficiently. The actual process itself seems to be pretty simple. The complicated part was just making a machine that could carry out the reactions and record the results quickly and automatically.

So, whatever they found seems to be a simple procedure. If it wasn't I don't think the machine would have picked it up.

fresh1

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Re: Princeton Discovers a Novel Route to Alpha-Aryl Amines
« Reply #3 on: November 30, 2011, 03:07:39 AM »
Oh i understand that, I believe the photoredox factor is very relevant to their success' as well,

I wasnt dissing your post, I was/am just in a humorous mood, however, it would be good to have more data on exactly what they DID achieve, and HOW, as in, "what compounds were they reacting to get what?"

Sure we all can use TFSE but I believe the more members share their SE results, the better. After all, this thread/topic, is your baby FF, not mine

looking forward to your finds,

regards f1
"Curiosity is a gift"

Sedit

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Re: Princeton Discovers a Novel Route to Alpha-Aryl Amines
« Reply #4 on: November 30, 2011, 03:19:06 AM »
Can anyone find a reference to this paper? I have searched MacMillan a bit and come up with nothing but I need to see what they are doing before anything can be made of this paper.
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dream0n

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Re: Princeton Discovers a Novel Route to Alpha-Aryl Amines
« Reply #5 on: November 30, 2011, 05:34:56 AM »
Discovery of an Alpha-Amino C–H Arylation Reaction Using the Strategy of Accelerated Serendipity
Andrew McNally, Christopher K. Prier, and David W. C. MacMillan
Science 25 November 2011: 334 (6059), 1114-1117. [DOI:10.1126/science.1213920]

Found from the link at the bottom of that linked page
http://www.sciencemag.org/content/334/6059/1114.abstract
« Last Edit: November 30, 2011, 05:41:00 AM by dream0n »
off to bigger and better things - don't worry I will visit from time to time

akcom

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Re: Princeton Discovers a Novel Route to Alpha-Aryl Amines
« Reply #6 on: November 30, 2011, 06:20:03 AM »
I'm really surprised you weren't able to find anything by MacMillan Sedit.  He's a huge player in the methodology field.

dream0n, your link is not publicly accessible, I've attached the paper here.

akcom

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Re: Princeton Discovers a Novel Route to Alpha-Aryl Amines
« Reply #7 on: November 30, 2011, 06:27:00 AM »
Btw I guess I should mention this paper is really interesting for their method of development but it's of absolutely no use the kitchen chemist.